SONICARE BEEPING ONE LONG TWO SHORT - Computers & Internet

probably dead battery, contact Sonicare

It appears to be something wrong with the unit - I would return it. It should not beep.

Hi Noel:
The instructions that came with it should tell you.
I'd guess at 2 possibilities:
1) Needs re-charging
2) Brush needs replacing

maybe the battery

Go to the Philips website to register your product. The site link is below.
Register your Product Philips Sonicare

Probably two reasons for this. 1) the contacts at the base of the brush are not clean which will prevent proper charging , the low battery beep is telling you to recharge.2) the battery needs replacing.

This happened to me as well. One long, two short beeps. Incessantly. Only happens when brush is on the charger.

Try this simple fix first. Hold down the SILVER button for 5 seconds while the toothbrush is on the charging base. If the fix works, it will fix the problem immediately like magic.

If that doesn't work, try this:
1) remove brushhead.
2) use screwdriver in the base and turn 1/4 turn
3) push out assembly from the top
4) dry the inside of of the base handle. allow to air dry
5) allow the switch to air dry
6) reassemble

The best tutorial for repairing Sonicare toothbrushes is here:
Repairing your Sonicare
The problem is either a corroded circuit board or worn-out Ni-Cad batteries. Both repair solutions require soldering, but full repair is possible.